Diaphragm-hood.



H. H. SGHROYER.

DIAPHRAGM HOOD. APPLICATION FILED APR1.22, 1912.

Patented June 3, 1913.

UNITED STATES PATENT OFFICE.

HARRY H. SCI-IROYER, or CHICAGO, ILLINOIS, ASSIGNOR To THE ACME SUPPLY COMPANY, A CORPORATION or ILLINOIS.

DIAPHRAGM-HOOD.

To all whom it may concern:

Be it known that I, HARRY I-I. SoHRoYEn, a citizen of the United States, and a res1- dent of the city of Chicago, in the county of look and State of Illinois, have invented certain new and useful Improvements in Diaphragm-Hoods; and I do hereby de-' clare that the following is a full, clear, and exact description of the same, reference being had to the accompanyingv drawings, and to the numbers of reference marked there on, which form a part of this specification.

This invention relates to improvements 1 n diaphragms such as set forth in my application for patent for Accordeon Plaited Vestibule Diaphragms, Serial No. 698,357, filed April 8, 1912, and in which, as shown the diaphragm is constructed of strlps arranged together face to face and alternate and opposite edges of which are united in pairs.

The object of this invention is to afford a metallic hood to cover the top of the d aphragm and protect the same from moisture, dirt and sparks.

The invention has also for its object a construction adapted to stiffen the top of the diaphragm and to afiord a suitable metallic gutter or trough extending beyond the top of the diaphragm to discharge moisture falling thereinto, therefrom.

It is an important object of this inventi on to provide a metallic hood or cover for the top of a diaphragm comprising a plurality of flexible interfitting sections.

The invention (in a preferred form) is illustrated in the drawings, and is hereinafter more fully described.

In the drawings: Figure 1 is a central,

fragmentary transverse section of a diaphragm and hood embodying my invention. Fig. 2 is a top plan view thereof. Fi is a section taken on line 33 of Fig. 1.

As shown in the drawings: 1, indicates the diaphragm face plate, and 2, the vestibule face plate.

3, indicates the legs of the diaphragm; 4, the outer reinforcing member for the outer edges of the strips affording the diaphragm; 5, the corresponding members for the inner edges of the strips; and 6, the inner reinforcing members, or those within the angles formed by the strips. The outer and inner reinforcing strips for the legs are engaged together in pairs at each of the outer Specification of Letters Patent.

Application filed April 22, 1912.

Patented June 3, 1913.

Serial No. 692,445.

i angles of the diaphragm to rigidly lock and engage the edges of the strips together, said {reinforcing strips being engaged together by bolts 7, extending therethrough. The outer reinforcing or clamping members 4, for the top of the diaphragm, are preferably made continuous from the top of the leg reinforcing member, with which the same articulate around the top of the. diaphragm.

Engaged by means'of bolts 4: near the to of the diaphragm, and at the edge of the attaching plate or strap 8, for engaging Tthe edge of the diaphragm to the face plate 1, is the female member of the hood, comprising a sheet of metal 9, extending {downwardly into the plait afforded by the diaphragm strips and at its inner edge bent =upwardly to afford a flange 10. Engaged at the opposite outwardly directed angle of 'the diaphragm adjacent the edge of the re 1 inforcing strip 4, is the male member of the hood, comprising a sheet 11, and extends outwardly and curves downwardly into the trough afforded by the flange 10, at the lower edge of the strip 9. Such a trough is provided between each pair of outwardly i directed angles at the top of the diaphragm, as shown in Figs. 2 and 3, the sheets affordin'g said trough being extended at their lower edges over the shoulders of the diaphragm and inclining upwardly and inwardly therefrom, as indicated in Fig. 1. By this construction, a large amount of resiliency is afforded for said hood, the individual sheets or members affording the same yielding readily to compensate for the movements of the diaphragm face plates, 'which vary the extension of the diaphragm.

The operation is obvious from the construction described, and although I have in dicated that the reinforcements for the anigles of the diaphragm along the meeting edges of the strips is of the type illustrated in my said co-pending application for patent, it is, of course, to be understood that metal hoods embodying my present invention may be attached in any suitable manner in place between the top folds or plaits of dia- :phragms of any type or kind, and entirely independently of the presence or absence of any reinforcing means for any portion of the diaphragm.

Obviously, the upper edges of the sheets or plates affording the hood may serve to reinforce and stiffen the top of the diaphragm, and it is quite immaterial whether the adjacent edges be sewed, stitched, riveted, or in any manner permanently en gaged together or releasably engaged together by the reinforcing means illustrated in the drawings.

I have shown and described but a preferred form of the invention, and I therefore do not purpose limiting the patent to be granted on this application, otherwise than necessitated by the prior art.

' I claim as my invention:

1. A metallic hood for diaphragms embracing a metallic sheet engaged at its upper edge along the top of the'hood and extend ing downwardly between the plaits and flanged upwardly at its lower edge, and a corresponding plate engaged on the adj acent plait and extending downwardly into the trough afforded by said flange, said sheets being of a length to extend approxi mately to the legs of the diaphragm.

2. A metallic hood for diaphragms embracing sheets of metal engaged across the top of the diaphragm at adjacent outwardly directed angles thereof, and extending downwardly into the plait with their lower edges interfitting.

3. A metallic top for diaphragms embracing resilient sheets or plates engaged at their upper edges along the adjacent outer ribs or angles of the diaphragm and extending inwardly to the bottom of the plait, one of said sheets having at its lower edge an upwardly turned flange within which the lower edge of the other engages.

4. A metallic hood for diaphragms embracing sheets engaged on adjacent ribs of the diaphragm top and extending inwardly of the plait, the edge or" one of said sheets affording a trough adapted to receive the edge of the other.

5. A diaphragm hood embracing sheets of metal engaged at their upper edges at the outwardly directed ribs of the diaphragm and extending into the plait at their free edges, an upwardly turned flange in one of the strips adapted to fit in the angle between the ribs, the free edge of the other of said strips extending outwardly and downwardly and within the flange.

6. A metallic hood for diaphragms embracing'a sheet of metal rigidly attached at its upper edge to the outer rib of the diaphragm and extending downwardly between the ribs and flanged upwardly at its lower edge, and of a length at its lower edge to extend to the legs, and a eomplemental sheet secured at the adjacent rib and extending downwardly and convexly curved toward the other of said sheets and en aged at its free edge within the angle.

7. A metallic hood for diaphragms embracing a metallic sheet engaged at its upper edge along the top of the hood and extend ing downwardly between the plaits and flanged upwardly at its free lower edge to afford a trough.

8. A metallic hood for diaphragms embracing sheets of metal engaged to the diaphragm, and extending downwardly into the plait wit-h their lower edges interfitting to afford a trough. 9. A top for diaphragms embracing resilient sheets or plates engaged on their edges to outer ribs of the diaphragm and extending inwardly and interfitting at their opposite edges to afford a trough at a point near the bottom of the plait.

10. A hood for diaphragms embracing a plurality of flexible interiitting sheets engaged on adjacent ribs of the diaphragm top and extending inwardly of the plait to afford a trough.

11. A diaphragm hood embracing sheets of flexible metal engaged at one of their edges to the ribs of the diaphragm and extending into the plait and interfitting to afford a trough at their free edges.

12. A metallic hood for diaphragms embracing a sheet of flexible metal attached at its upper edge to the outer rib of the diaphragm and extending downwardly between the ribs and flanged upwardly at its free lower edge, and of a length at its lower edge to extend to the legs.

13. A metallic hood for diaphragms embracing a metallic resilient sheet engaged along the top of the hood and extending downwardly between the plaits and flanged upwardly at its lower edge, and a corresponding sheet engaged on the adj aeent plait and extending downwardly into the trough afforded by said flange.

1A. A metallic hood for diaphragms embracing a flexible sheet attached to the outer rib of the diaphragm and extending downwardly between the ribs and flanged upwardly at its free lower edge, and a coinplemental sheet secured at the adjacent rib and extending downwardly and convexly curved toward the other of said sheets and projecting at its free edge within the angle.

In testimony whereof I have hereunto subscribed my name in the presence of two subscribing witnesses.

HARRY I-l. SCHROYER.

Witnesses CHARLES W. HILLS, J12, LAWRENCE Rnins'rnix.

Copies of this patent may be obtained for five cents each, by addressing the Commissioner of Patents. Washington, I). G. 

